Home / 839.29-1,258.12-319.14

Finding the Fourth Proportional to 839.29, 1,258.12 and 319.14

Calculator

Solution

The fourth proportional to 839.29, 1,258.12 and 319.14 is: 478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.29 : 1,258.12 = 319.14 : x
  2. Step 2: Convert to fraction form
    839.29/1,258.12 = 319.14/x
  3. Step 3: Cross multiply
    839.29x = 1,258.12 × 319.14
  4. Step 4: Simplify right side
    839.29x = 401,515.02
  5. Step 5: Solve for x
    x = 401,515.02/839.29
  6. Step 6: Final answer
    x = 478.40

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.